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Finding the Fourth Proportional to 338.90, 508.41 and 107.82

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Solution

The fourth proportional to 338.90, 508.41 and 107.82 is: 161.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.90 : 508.41 = 107.82 : x
  2. Step 2: Convert to fraction form
    338.90/508.41 = 107.82/x
  3. Step 3: Cross multiply
    338.90x = 508.41 × 107.82
  4. Step 4: Simplify right side
    338.90x = 54,816.77
  5. Step 5: Solve for x
    x = 54,816.77/338.90
  6. Step 6: Final answer
    x = 161.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.